ISP
Amazon.com
Detected client
Overview
The address and location we resolved for this request. Look up any other IP with the field below.
216.73.216.37
Columbus, Ohio — United States
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DNS lookup
Query records for a hostname against a public resolver.
PTR
Reverse DNS
Find the hostname that an IP address points back to.
ICMP
Ping
Send four echo requests and report round-trip times.
Path
Traceroute
Map the network hops between this server and a host (up to 15 hops).
Registration
WHOIS
Look up registration and ownership details for a domain.
HTTP
HTTP headers
Fetch the response headers for a URL. Private and reserved addresses are blocked.
TLS
SSL / TLS certificate
Inspect the certificate a host presents — issuer, validity window, days remaining, and whether it covers the name you entered.
Mail health
Check a domain's MX records and whether SPF and DMARC are published — the basics of deliverability and anti-spoofing.
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